THE CHOICE SCHOOL, TRIPUNITHURA

SUMMER ASSIGNMENT

GRADE XII

General Instructions:

Answers must be written on A4 sized ruled paper unless specified otherwise

All work must be original and neatly written.

Date of Submission : First week of reopening

1. ENGLISH

2. Read a few samples of some Letters to the Editor and select any two. Paste them on an

A4 size paper and in a paragraph each (50-75 words) write why you selected these letters

and give your analysis of them.

3. Read the lesson „The Enemy‟ from the text Vistas and in a paragraph of 100-120 words

compare and contrast Dr.Sadao and the General.

2. MATHEMATICS

ASSIGNMENT -1 CONTINUITY & DIFFERENTIABILITY

1. Differentiate the following with respect to x:

a) logsin( )

b) √

c) log ( x + √ )

d) sin (m )

e) √

2. Differentiate logtan (

+

) with respect to x. Ans: secx

3. If y = √ , prove that

=

√

4. If y =

√ , prove that (1- )

= x +

5. Differentiate √

with respect to x. Ans:

√

Hint : Put x = tanθ

6. Find

, = xy Ans :

7. If x= a (1 – cosθ) , y = a(θ +sinθ) ,prove that

=

at θ =

8. If y = sin(sinx) , prove that + tanx .

+ y x = 0

9. The volume of a spherical balloon is increasing at the rate of 25 / sec.Find the rate

of change of its surface area at the instant when the radius is 5cm.

Ans. 10 / sec

10. Differentiate with respect to x ;

11. If = , find

12. If y = A cos(logx) + B sin(logx) , prove that +x + y = 0

13. Find the value of ` K` if the function is continuous at x= 0 .

F(x) =

, x 0

0 , x = 0

14. Verify Mean Value Theorem for the function for the function f(x) = 2sinx + sin2x in the

[0 , ]

15. Verify Rolle`s theorem for the function f(x) = sinx + cosx , x [0 ,

]

16. Show that the function | | x is continuous , but not differentiable at x=3.

17. Find the values of a and b if the function is defined by

F(x) = + 3x + 3 , x 1

= bx + 2 , x 1 , is differentiable at x=1.

18. If y = cos ( ) , show that (1- ) - x + y = 0

19. Differentiate w.r.t x a)

20. Differentiate √

.

3. PHYSICS

RAY OPTICS- ONE MARK QUESTIONS

1. The line AB in the ray diagram represents a lens. State whether the lens is convex or

concave.

2. A convex lens is placed in contact with a plane mirror. A point object at a distance of 20

cm on the axis of this combination has its image coinciding with itself. What is the focal

length of the lens?

3. Under what condition a biconvex lens of glass having a certain refractive index does acts

as a plane glass sheet when immersed in a liquid?

4. For the same value of angle of incidence, the angles of refraction in three media A, B and

C are 150,

250

and 350 respectively. In which medium would the velocity of light be

minimum?

5. How does the focal length of a lens change when red light incident on it is replaced by

violet light? Give reason for your answer.

6. A converging lens is kept coaxially in contact with a diverging lens-both the lenses being

of equal focal lengths. What is the focal length of the combination?

7. When light travels from a rarer to a denser medium, the speed decreases. Does this

decrease in speed imply a decrease in the energy carried by the light wave? Justify your

answer.

8. Two thin lenses of power +6D and – 2D are in contact. What is the focal length of the

combination?

9. How does the angle of minimum deviation of a glass prism vary, if the incident violet

light is replaced by red light? Give reason.

10. Show the variation of u and v for a convex mirror.

TWO MARK QUESTIONS

11. A ray of light passes through an equilateral glass prism such that the angle of incidence is

equal to the angle of emergence and each of these angles is equal to ¾ of angle of prism.

Find the angle of deviation.

12. Calculate the speed of light in a medium whose critical angle is 45 0

.

13. Does critical angle for a given pair of media depend on wavelength of incident light? Give

reason.

14. Trace the path of a ray of light passing through a glass prism ABC as shown in the figure.

If the refractive index of glass is √3, find out the value of the angle of emergence from the

prism.

15. An object AB is kept in front of a concave mirror as shown in the figure. (i)Complete the

ray diagram showing the image formation of the object.

(ii)How will the position and intensity of the image be affected if the lower half of the

mirror‟s reflecting surface is painted black?

16. A ray of light incident on an equilateral glass prism (µ g = √3) moves parallel to the base

line of the prism inside it. Find the angle of incidence for this ray.

17 . Define refractive index of a transparent medium.

A ray of light passes through a triangular prism. Plot a graph showing the variation of the

angle of deviation with the angle of incidence.

17. A ray PQ incident normally on the refracting face BA is refracted in the prism BAC made

of material of refractive index 1.5. Complete the path of the ray through the prism. From

which face will the ray emerge? Justify your answer.

19. By drawing the ray diagram, show how a right angled isosceles prism can be used to

deviate a ray of light through (i) 900 and (ii) 180

0

20. Derive the relation between refractive index of a medium and its critical angle.

THREE MARK QUESTIONS

21. (a) Give two reasons to explain why reflecting telescopes are preferred over refracting type.

(b) Use mirror equation to show that convex mirror always produces a virtual image

independent of the location of the object.

22. Derive the relation between refractive index of a medium and its critical angle.

23. (a) Draw a labeled ray diagram showing the formation of a final image by a compound

microscope at least distance of distinct vision.

(b) The total magnification produced by a compound microscope is 20. The magnification

produced by the eye piece is 5. The microscope is focused on a certain object. The distance

between the object and eyepiece is observed to be 14 cm. If least distance of distinct vision is to

be 20 cm, calculate the focal length of the objective and eyepiece.

24. (a) A mobile phone lies along the principal axis of a concave mirror. Show, with the help of a

suitable diagram, the formation of this image. Explain why magnification is not uniform.

(b) Suppose the lower half of the concave mirror‟s reflecting surface is covered with an opaque

material. What effect this will have on the image of the object?

25. You are given three lenses L1 , L2 and L3 each of focal length 20 cm. An object is kept at 40

cm in front of L1 as shown in figure. The final real image is formed at the focus “I “of L3. Find

the separation between L1 , L2 and L3.

26. A converging lens has a focal length of 20 cm is in air. It is made of a material of refractive

index 1.6. It is immersed in a liquid of refractive index 1.3. Calculate its new focal length.

27. Use the mirror equation to show that

(i) an object placed between f and 2f of a concave mirror produces a real image beyond

2f.

(ii) a convex mirror always produces a virtual image independent of the position of the

object.

(iii)An object placed between the pole and focus of a concave mirror produces a virtual

and enlarged image.

28. A compound microscope uses an objective lens of focal length 4 cm and an eye piece lens

of focal length 10 cm. An object is placed at 6 cm from the objective lens. Calculate the

magnifying power of the compound microscope. Also calculate the length of the microscope.

29. A giant refracting telescope at an observatory has an objective lens of focal length 15 m. If an

eye piece lens of focal length 1 cm is used, find the angular magnification of the telescope. If this

telescope is used to view the moon, what is the diameter of the image of the moon formed by the

objective lens? The diameter of the moon is 3.42 x 10 6 m and the radius of the lunar orbit is 3.8

x 10 8 m.

30. Define power of a lens. Write its unit. Deduce the relation 1/f = 1/f1 + 1/f2 for two thin

lenses kept in contact coaxially.

31. (i) Draw a neat labeled ray diagram of an astronomical telescope in normal adjustment.

Explain briefly it‟s working.

(ii) An astronomical telescope uses two lenses of powers 10 D and 1 D. What is the magnifying

power in normal adjustment?

32. An illuminated object and a screen are placed 90 cm apart. Determine the focal length and

nature of the lens required to produce a clear image on the screen, twice the size of the object

FIVE MARK QUESTIONS

34. A biconvex lens with its two faces of equal radius of curvature R is made of a transparent

medium of refractive index µ1. It is kept in contact with a medium of refractive index µ2 as

shown in the figure.

(a) Find the equivalent focal length of the combination.

(b) Obtain the condition when this combination acts as a diverging lens.

(c) Draw the ray diagram for the case µ1 ˃ ( µ2 + 1 ) / 2 , when the object is kept far

away from the lens. Point out the nature of the image formed by the system.

36. How is the working of a telescope different from that of a microscope?

The focal lengths of the objective and eyepiece of a microscope are 1.25 cm and 5 cm

respectively. Find the position of the object relative to the objective in order to obtain an angular

magnification of 30 in normal adjustment

37. Draw a labeled ray diagram to show the formation of image in an astronomical telescope for

a distant object. Write three distinct advantages of a reflecting type telescope over a refracting

type telescope.

A convex lens of focal length 10 cm is placed co axially 5 cm away from a concave lens of focal

length 10 cm. If an object is placed 30 cm in front of the convex lens, find the position of the

final image formed by the combined system.

38. Derive a mathematical relation between refractive indices n1 and n2 of two radii and radius of

curvature R for the refraction at a convex spherical surface. Consider the object to be a point

lying on the principal axis in rarer medium of refractive index n1 and a real image formed in the

denser medium of refractive index n2. Hence derive lens maker‟s formula.

39. Light from a point source in air falls on a convex spherical glass surface of refractive index

1.5 and radius of curvature 20 cm. The distance of light source from the glass surface is 100 cm.

At what position is the image formed?

40. Draw a labeled ray diagram to obtain the real image formed by an astronomical telescope in

normal adjustment position. Define its magnifying power.

You are given three lenses of power 0.5 D, 4 D and 10 D to design a telescope.

(i) Which lenses should be used as objective and eyepiece? Justify your answer.

(ii) Why is the aperture of the objective preferred to be large?[5]

41. Draw a ray diagram depicting the formation of image by an astronomical telescope in normal

adjustment.

You are given the following three lenses. Which two lenses will you use as an eye piece and as

an objective to construct an astronomical telescope. Give reason.

Lenses Power(D) Aperture(cm)

L1 3 8

L2 6 1

L3 10 1

42. Draw a ray diagram to show the image formation by a combination of two thin convex lenses

in contact. Obtain the expression for the power of this combination in terms of the focal lengths

of the lenses.

A ray of light passing from air through an equilateral glass prism undergoes minimum deviation

when the angle of incidence is ¾ th

of the angle of prism. Calculate the speed of light in the

prism.

43. (i) Monochromatic light of wavelength 589 nm is incident from air on a water surface. If µ

for water surface is 1.33, find the wavelength, frequency and speed of the refracted light.

(ii)A double convex lens is made of glass of refractive index 1.55, with both faces of the same

radius of curvature. Find the radius of curvature required, if the focal length is 20 cm.

4.CHEMISTRY

Intext and Exercise Questions of

1. Electrochemistry.

2. Haloalkanes and Haloarenes

5. BIOLOGY

Complete the second worksheet (MOLECULAR BASIS OF INHERITANCE) and submit.

6.HOMESCIENCE

ANSWER THE FOLLOWING QUESTIONS GIVEN BELOW

Chapter 15- Application of elements of art and principles of design in apparel design

1. What lines will you use in clothing to express vigour and vitality?

2. What is fashion, style and fad?

3. Give 4 suggestions by which you can use various colours in clothing to disguise figure

flaws.

4. How do straight lines in a dress influence the personality of a person? Use examples to

explain the point

5. Explain with the help of examples or diagrams how balance is achieved in the design of

the dress and what is its effect on the dress?

6. Give 2 ways in which your physique is influenced by vertical lines in clothes

7. List 6 points you will keep in mind while selecting summer clothes for your tall and

thin sister?

8. Present 2 arguments each to a person to convince her that the dress she is buying has

rhythm in its design?

9. What 6 points will you keep in mind while selecting summer clothes for yourself?

10. Using each of the four elements of art, suggest a suitable shirt and pant for a very tall

person.

11. Using each of the 4 elements of art, suggest a suitable design of a skirt and blouse for a

fat girl

12. Mention 2ways of creating balance in a frock

13. Radha is a tall and thin girl. Mention 4 features she should avoid while choosing her

dress.

14. Explain one effect each of horizontal lines in design and square necklines in clothes on

the figure of a person

15. Illustrate and design a dress for yourself based on the elements of design. Give a brief

note of it (draw in an A4 size sheet)

CHAPTER 16, 17

Selection and Purchase of Fabrics

Factors Influencing the Selection of Apparel

1. Which 2 qualities would you look in a dress for yourself?

2. What features should be there on placket?

3. Why should you have an additional hook/button on the dress placket that is long?

4. State 2 indicators of good workmanship in the collar of a gent‟s shirt?

5. Write 4 points you will keep in mind while purchasing a readymade dress for your 2-year-

old niece?

6. What 6 points would you inspect from quality point of view in purchasing a readymade

salwaar kameez?

7. List 4 checks related to workmanship which you will keep in mind while purchasing a

pant?

8. Which 6 points would you check in buying a readymade shirt for your brother?

9. You want to buy fabric for your sofa. With an eye on easy maintenance, what 4 qualities

would you look for in the fabric?

10. Which are the points to be kept in mind while selecting clothes for an athlete?

11. You want to buy curtains. Write 4 qualities which would ensure that they are easy to

maintain?

12. Your mother wants to buy fabrics to be worn in office. To ensure easy maintenance, what

4 features she should check?

CHAPTER 18- CARE, MAINTANENCE AND STORAGE OF CLOTHES

1. Which are the washing aids used for washing clothes?

2. Which are the qualities of a good soap?

3. Differentiate between soaps and detergents.

4. Explain the cold and hot process of making soap?

5. Which are the points to be noted while storing various types of fabrics for the season?

(cotton, silk, wool, nylon, polyester )

6. Write the steps to remove unknown stain from a fabric?

7. PSYCHOLOGY

1. Explain the three neurological activities that determine the intelligence of a person.

2. Discuss the structure of mind according to Sigmund Freud.

3. Distinguish between creativity test and IQ test.

4. Define the following: a) intelligence b) personality c) aptitude d) values

5. What are the differences between individual and group tests?

8. ACCCOUNTANCY

Chapter FINANCIAL STATEMENT

1. Name the sub-heads under the head (a) „Shareholder Funds‟ and (b) Non-current

liabilities in the Equity and Liabilities part of the Balance Sheet as per Schedule III of

the Companies Act 2013.

2. Name the items that are shown under the head Other Current Liabilities and the items

under the head „Other Current Assets in the Balance Sheet of a company as per

Schedule III of the Companies Act 2013.

3 Prepare the Balance Sheet of K Ltd.as per schedule III of the Companies Act 2013

from the following particulars:

Particulars `

Trade Payables 1,60,000

Provision for Tax 40,000

Proposed Dividend 1,20,000

Share Capital 12,00,000

Long term Provision 30,000

General Reserve 3,00,000

Balance of statements of Profit & Loss ( Cr) 2,60,000

Tangible fixed Assets 17,30,000

Trade Receivables 4,00,000

Provision for Doubtful Debts 20,000

4

Prepare Statement of Profit and Loss from the following information extracted from

the books of X Ltd. as at 31st March 2017.

Particulars `

Sales 50,00,000

Purchase of stock in Trade 30,00,000

Wages 10,00,000

Interest received 60,000

Bonus 1,20,000

Interest on Debentures 80,000

Opening stock in trade 3,00,000

Closing stock in trade 5,00,000

5. Under which major head of the Statement of Profit and Loss of a company following

items will appear.

a) Interest earned b) Profit on sale of fixed asset c) Patents written off.

d) Materials purchased e) Entertainment expense f) Interest paid on debentures

6.

On 1 st April 2017 X Ltd has a debit balance of `3,00,000 in Reserves and Surplus as

Balance of Statement of Profit & Loss. It earned a profit of `5,00,000 for the year

ended 31 March 2018. How would you show these items in the Balance sheet and

notes to accounts?

7. Under which major heads and sub heads will the following items be placed in the Balance

Sheet of the company as per Schedule III, Part I of the Companies Act 2013.

Items Main-heading Sub-heading

Premium on redemption of Debentures

Loose Tools

Bank overdraft

Tax Reserve

Interest on Calls in Advance

Stores and Spares

Mining Rights

Encashment of employees earned leave

payable on retirement

Vehicles

Debentures

Calls-in-advance

Subsidy Reserve

Provision for doubtful debts

Proposed Dividend

Computer software

Preliminary Expenses

Bills Receivable

Goodwill

Authorised Capital

Forfeited Shares A/c

Unclaimed Dividend

Arrears of fixed cumulative dividend

Long –Term Investment with maturity

period less than six months.

Deposit with Electricity Supply Company

Interest accrued on investment

Work in progress (machinery)

Securities Premium Reserve

Capital Reserve

Public Deposits

Interest accrued and due on debentures

Advances received from customers

Bills Payable

Sundry Creditors

Calls in arrear

Interest accrued and due on unsecured loans

Publising Titles

Shares of Reliance Ltd

Prepaid Insurance

Deposit with custom authorities

Provision for tax

Debit balance of statement of Profit & Loss

Credit balance of statement of Profit & Loss

Cash and cash equivalents

9. BUSINESS STUDIES

MARKETING

1. Beauty Products Ltd. Is a natural and ethical beauty brand famous for offering organic

beauty products for men and women. The company uses plant based materials for its

products and is No.1 beauty brand in the country. It not only satisfies its customers but also

believes in the overall protection of the planet.

Identify the marketing management philosophy being followed by „Beauty Products Ltd.‟

2. Jasdeep, a dealer in school uniforms, decided to maximize his profit by using different

aggressive promotional efforts.

a. Identify the marketing management philosophy adopted by Jasdeep.

b. Explain this philosophy on the basis of:

a. Main focus b. Means and ends

3. Maruti Vega Ltd. Entered into the market with coloured televisions and has now introduced

products like audio systems, air conditioners, washing machines, etc. the company is not

only offering the products but also handling complaints and offering after-sales service.

Identify the element of marketing mix discussed here.

4. Suraj is a small entrepreneur involved in the manufacturing of hair wax. He finds that cost of

production of 100gm of hair wax is Rs.250. He has decided to keep a margin of 15% as

profit. Moreover, he has assessed that there is a free competition in this product segment.

In this context of above case:

a. Identify the function of marketing being performed by Suraj.

b. State briefly the two factors that he is taking into consideration while performing

the function as identified in part (a).

5. After doing a diploma in entrepreneurship, Farhan started his own confectionary business.

He started doing a lot of hard work and used the recipes taught by his grandmother in various

preparations. He also learnt many recipes from online sites and television programmes. He

decided to keep the price of the product low initially and also informed his customers about

the goodness of the items sold by them. However, he didn‟t mention on the package of each

item whether it contained eggs or not. As a result, vegetarian people became hesitant in

buying things from his shop as they had to verbally inquire from him about the inclusion of

eggs in the preparation of various items.

In this context of above case:

a. Name the important aspect related to the marketing of products which has been

ignored by Farhan.

b. Explain briefly any three functions performed by the aspect as identified in par (a).

6. Crackers Ltd., a fire cracker manufacturing company launched some new products on eve of

Diwali which attracted many buyers. To meet the increased demand, the company employed

children from nearby villages. Although the product was in great demand, appropriate safety

warnings for use were not mentioned on the packets that led to many accidents.

a. Identify and explain the important product related decision that was not taken into

consideration by the company.

b. Also, identify any two values which were violated by the company.

7. As a project work in Business Studies, the commerce students of Himachal Public School,

Himachal Pradesh thought of preparing apple jam from the apples grown in their school

premises and sells it in the school annual fete. They approached the Principal who not only

appreciated the students but also gave her consent for the same. The school decided to

donate 50% of the revenue generated from the sale to a nearby orphanage. After the school

fete, the school also decided to extend this project by providing employment to visually

challenged and disadvantaged sections of society on regular basis.

a. Explain any two product related decisions which the students had to take.

b. Suggest any two functions that the „label‟ of the jam bottle must perform.

c. Identify two values communicated to society by this project of Himachal Public School,

Himachal Pradesh.

8. Radhika was a student of Business Studies of class 12. Her father was a farmer who grew

different varieties of rice and was well versed in various aspects of rice cultivation. He was

selected by the government for pilot project on rice cultivation. As a project work in

Business Studies, she decided to study the feasibility of marketing good quality rice at a

reasonable price. Her father suggested her to use internet to gather consumer‟s views. She

found that there was a huge demand for packaged organic rice. She knew that there were no

predetermined specifications in case of rice because of which it would be difficult to achieve

uniformity in the output. To differentiate the product from competitors, she gave it the name

of “Malabari organic rice” and classified into three different varieties, namely, popular,

classic and supreme, based on the quality. She felt that these names would help her in

product differentiation. Explain the three functions of marketing, with reference to the above

paragraph.

10. ECONOMICS

IMPORTANT ADDITIONAL QUESTIONS – NATIONAL INCOME ACCOUNTING

1. Define the term Macro Economics.

2. Define the term National Income.

3. Who are Normal Residents?

4. Briefly explain the concept of Depreciation or Consumption of Fixed Capital (CFC). What

is its relevance in National Income Accounting.

5. Briefly explain the concept of Net Indirect Tax.

6. Define the term Net Factor Income from Abroad & explain its components.

7. Explain the methods (Output/ Income/ Expenditure) of measuring NI. Also state their

precautions.

8. Define the term Double counting with the help of an example.

9. Differentiate between Real & Nominal GDP. Which one is a better indicator of economic

growth, & why?

10. What is meant by economic welfare? What is its indicator?

11. Explain the limitations of Per Capita Real GDP as Indicator of Economic Welfare.

OR

“The economic growth of a country is rising but most of the people are still poor & there is

a huge environmental pollution.” Explain.

12. How Real GDP is derived?

13. Explain the circular flow of Income & Product (two sector model).

14. How are the following treated while estimating private final consumption expenditure? Give

reasons for your answer.

Ans : 1. Exports; 2. Direct purchases made abroad by resident household; 3. Final

consumption expenditure of non-profit institutions serving households; 4. Change in

stocks.

15. Differentiate between stock & flow.

16 What is national debt interest?

17. How will you treat the following in the calculation of gross domestic product of India? Give

reasons for your answers.

(i) Profit earned by a branch of foreign Bank in India.

(ii) Salaries of Indian employees working in embassy of Japan in India

(iii) Salaries of residents of Japan working in Indian embassy of Japan

17. Classify the following expenditures as intermediates consumption expenditures and finals

consumption expenditures.

(i) Expenditure on research and development by TATA on Nano car.

(ii) Insurance premium paid by a firm to an insurance company.

(iii) Insurance premium paid by households to an insurance company.

(iv) Expenditure on repairs and maintenance of plant and machinery.

(v) Expenditure incurred by a firm on purchase of equipment.

(vi) Advertising expenditure incurred by Airtel on promotion of its product.

(vii) Business expenses of employees on tour and entertainment.

Ans: Intermediates consumption expenditure: (i), (ii), (iv), (vi), (vii); final consumption

expenditure: (iii), (v).

18. Whether the following items will be included in National Income? Give reasons for

your answer.

1. Payment of electricity bill by a factory.

2. Dividend on shares.

3. Increase in stock of consumer goods with households.

4. Bus fare of a passenger.

5. Gains from sale of shares.

6. Rent earned by Reliance from its building in USA.

7. Gifts from Abroad.

8. Retained earnings of resident companies from abroad.

9. Expenses of foreign visitors in India.

10. Gifts to a trust from Japan.

18. In the determination of social welfare what matter is the quantum of output rather than the

composition of output? Defend or refute.

19. Why are exports included in the estimation of domestic income?

20. Why are imports consider as a negative item in the estimation of domestics income?

21. Is brokerage paid to real estate agents only on the sale and purchase of new houses included

in the estimation of National Income?

22. In the estimation of GDP (using expenditure method), we focus only on expenditure by the

resident of a country. Is it true?

Ans. No, it is not true. In the estimation of GDP we include all expenditure on the domestically

produced goods purchased both by the resident as well non-residents of a country.

11. INFORMATICS PRACTICES

Chapter-1 Networking

1 Mr. Sen wants to prevent unauthorized access to/from his computer‟s local area

network. Write the name of a system (software/hardware), which he should install to do

the same.

2. Ceemas is a fashion company with design unit and market unit 130 meters away from

each other. The company recently connected their LANs using Ethernet cable to share the

stock related information. But after joining their LANs they are not able to share the

information due to loss of signal in between. Which device should be installed for a

smooth communication?

3. Which of the following is not a feature of networking?

a) Resource sharing c) Uninterrupted power supply

b) Reliability d) Reduced cost

4. What is meant by network protocol?

5. Identify the type of topology for the following .

i) In it, each node is connected with the help of a single co-axial cable.

ii) In it, each node is connected with the help of independent cable with help of a

central switching.

6. Define the following with reference to threats network security:

i) Worm

ii) Trojan Horse

7. Raj. Kamal is planning to connect all computers, each spread over distance within 45

meters. Suggest an economical cable type having high-speed data transfer, which can be

used to connect these computers.

8. What is meant by domain name resolution?

The process of obtaining corresponding IP address from a domain name is called domain

name resolution.

9. Which of the following units measures the speed with which data can be transmitted from

one node to another node of a network?

i) KMph

ii) KMpl

iii) Mbps

10. Name any two most popularly used internet browsers.

11. Ms. Rani Sen General Manager of Global Nations Corporate recently discovered that the

communication between her company‟s accounts office and HR office is extremely slow

and signals drop quite frequently. These offices are 125 meters away from each other and

connected by an Ethernet cable.

i) Suggest her a device, which can be installed in between the offices for smooth

communication .

ii) What type of network is formed by having this kind of connectivity out of LAN,

WAN and MAN?

12. Give an advantage of using star topology over Bus topology. Show a network layout of

star topology to connect 5 computers.

13. Differentiate between URL and Domain name.

14. What is meant by topology?

15. Jai Khanna is confused between the terms Domain Name and URL. Explain the

difference with the help of appropriate examples of each.

16. It is a technology on computer networks whose purpose is to prevent unwanted

networking connection according to some filtering/blocking rules. What is it?

17. Which Transmission medium is used for hilly area.(Long Distance)

18. Name the protocol used for sending and receiving e-mails.

19. An organization is planning to link its sale counter situated in various parts of the same

city. Which type of network out of LAN, MAN or WAN will be formed?

20. An organization is planning to link its head office in Delhi with the office at Srinagar.

Suggest an economic way to connect it. Justify your answer.

21. What is hub and switch?

22. Why switch is called an intelligent hub?

23. Which protocol lets you log onto a remote machine and run specific applications there?

24. Which transmission medium is useful for sparsely populated areas?

25. A device receives a signal on an electromagnetic or optical transmission medium,

amplifies the signal, and then retransmits it along the next leg of the medium. Which

device is this?

26. A web server has started receiving endless messages. What is this situation like?

27. Which Transmission medium is used for hilly area.(short Distance)?

28. Tara wants to upload and download files from / to a remote internet server. Write the name

of the relevant communication protocol, which will let her do the same.

29. Two doctors in the same room have connected their Palm tops using Bluetooth for

working on a group presentation. Out of the following , what kind of Network they have

formed? LAN, MAN, PAN, WAN.

30. Define any two threats of network security.

Or

Write any two access attacks or intrusion problem.

31. Which protocol is used for direct communication two computers or dial

up access to the internet or telephone line or serial cable.

32. Arrange the following communication channels in ascending order of their data

transmission rates. Ethernet cable, Optical fibre, Telephone cable, Co-axial.

33. Which protocol is used for the transfer of hypertext documents on the internet?

34. Which transmission medium should be used to transfer data across two continents at

very high speed?

35. The following numbers indicate an address.

208.77.88.166

What is the above address called? To which device is it assigned?

36. Most common communication protocol on internet that ensures end to end

communication is?

37. Identify the topology from the following?

1) In it, the nodes form a circular path for data to travel and each node is connected to

two other nodes.

2) In it, devices are connected through hub , hub is responsible for receiving and

transmitting data from each node to destination.

38. Differentiate between tree and bus topology?

39. Write two advantages and disadvantages of Optical Fibre cable.

40. How is coaxial cable different from optical fibre?

41. What is meant by workstation and server? What are the different types of servers?

42. Define the term Domain name resolution.

43. Explain any two topologies with diagram.

44. Akhil is transferring songs from his mobile to his friend‟s mobile .Which transmission

medium is used here?

45. Differentiate between MAC address and IP address? Explain the name of the address

given below and mark the parts of it.

10: B5: 03: 63: 2E: FC

46. Which network topology requires transmitters at the ends of the lines?

47. Write any two techniques used for network security.

48. Name the protocol which is used to exchange files on internet?

49. The protocol which is used to transfer files, videos, images etc over the world wide web.

50. What is wi-fi?

It is a set of popular technologies and standards for wireless computer networking.

51. What is the unique name given to the site that becomes site‟s identification on internet.

52. What type of network will be used to link the head office in Delhi to another office in

Japan?

53. Define the term network.

54. What is meant by NIU/TAP?

55. Define the terms bandwidth and data channel.

56. What is the purpose of the following?

Gateway

Bridge

Repeater

Router

57. What are the different types of network?

58. What is the purpose of modem? What are the two types of modem?

59. When would you prefer hubs over repeaters?

60. When would you prefer switch over hubs?

61. A school would like to go in for network of all he computers. Which topology would you

recommend?

62. What is meant by NIC?

63. What is meant by firewall?

64. What is meant by Denial of service (DOS) attacks? What are the different types of DOS

attacks

Denial of access to information

Denial of access to applications

Denial of access to systems

Denial of access to communication

65. What is meant by network security?

66. Which is the numbered address that identifies a website uniquely?

67. Alphabetical name of a website is called

68. What is meant by communication channel/transmission media? What are the two types of

communication channel?

69. Differentiate between LAN and WAN?

70. The bleeding of a signal from one wire to another and which can corrupt signal and cause

network errors.- Crosstalk.

71. Write any two advantages and disadvantages of the following topologies.

72. his cable uses light to transmit data instead of magnetic signals.

75. What is meant by snooping?

76. What is meant by eavesdropping?

77. What is the purpose of Team viewer??

78. Management of Global village enterprise wants that the LAN segment in each of its

buildings get a dedicated bandwidth i.e bandwidth must not be shared. How can this be

achieved?

79. Which device is used to connect two different types of networks?

80. What are the different threats of network security?

81. Write the full form of the following.

IP address

MAC address

TCP/IP

SMTP

FTP

HTTP

URL

DOS attacks

NIC

Wi-fi

12. COMPUTER SCIENCE

1. What‟s the meaning of type(2.3)?

2. What does print() do?

3. What‟s the difference between 12 + 13 and "12" + "13"?

4. Consider the following Python fragment:

n = 3

m = 5

n = n + m

m = n – m

n = n – m

5. What values do we have in the two variables at the end? Can you summarize the meaning of

the last three lines, in general? What kind of statements are the five statements above?

6. What‟s the difference between 2/3 * 9 and 9 * 2/3?

7. What do + and * mean in a string context?

8. How do you calculate 1.5 squared (it‟s 2.25) and how do you calculate the square root of 2 in

Python?

9. Is 1 the same as 1.0 in Python?

10. If the variable a contains a 1 and the variable b contains a 2 write the shortest expression that

evaluates to 0.5 using a, b but no literals or additional variables.

11. 1The logarithm in base 10 of a number n is the x in the equation 10x = n. Write a program

that checks this equation for a number of your choosing.

12. Write Python expressions that verify the following identities:

a) xx log10 for x > 0, and

b) 543 22 (calculate both sides and print them, then look at them to compare).

13. Define a function called bart which prints the ASCII art below every time it‟s called:

|\/\/\/|

| |

| |

| (o)(o)

C _)

| ,___|

| /

/____\

/ \

14.Write another function, called three, which produces the ASCII art shown above three times,

one below the other. How short can you make a program that prints one hundred Bart Simpsons?

15. Write a function called add that receives two arguments (integers), adds them up in a local

variable x and prints x. Is x available outside add? What happens if you call add with two string

arguments?

16. What is a function in Python? Can you define your own functions in Python?

17. Consider the following Python program:

def fun(x, y):

return x * y # [2]

a = fun(2, 3) # [1]

b = fun("2", 3)

print a, b

18. What does it evaluate to? Replace the last statement print( a, b) with print (a + b) and explain

the traceback. What‟s wrong? Now eliminate the line marked [1] and change line [2] to read

return x + y. Run the program and explain the traceback.

19. Consider the following definition:

def fun(n, m):

return m - n

20. Evaluate the following expressions (perhaps using stack diagrams:

a) fun(fun(1, 2), 3)

b) fun(fun(1, 2), fun(3, fun(fun(4, fun(5, 6)), 7)))

c) fun(fun(1, 2), fun(3, fun(fun(4, fun(5, 6)), fun(7, 8))))

21. What happens if in the definition of fun above we replace return by print1?

22. Considering the following definitions:

def alpha(x, y):

return x + beta(y, x)

def beta(x, y):

return y – x # [1]

What does alpha(2, 3) evaluate2 to?

23. How does the answer change if the line marked [1] is changed to return x – y?

24. Consider the following definition:

def fun(x):

a = x + 1

print a

fun(a)

Using stack diagrams can you anticipate the result of calling fun(-10)?

25. Evaluate (a / b) * b + a % b where a and b are integer variables .

26. Write a program that determines the coins that a cashier will need to return an amount of

money originally expressed in cents (e.g., a change of 123 cents will be returned as 4 quarters, 2

dimes, 0 nickels and 3 cents).

27. Consider the following code:

if x > 3:

if x <= 5:

y = 1

elif x != 6:

y = 2

else:

y = 3

else:

y = 4

If y has the value 2 after executing the above program fragment, then what do you know about

the initial value of x?

13. PAINTING

Students are to do research on an artist and present a seminar to be conducted in class after the

school reopens.

14. SOCIOLOGY

On the basis of the topic chosen for the project, complete the research using any one sociological

research method.

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